<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
   <title>window</title>
</head>
<body>


<div id="app">
    java:<input type="checkbox" value="java" v-model="languages"/><br/>
    python:<input type="checkbox" value="python" v-model="languages"/><br/>
    c++:<input type="checkbox" value="c++" v-model="languages"/><br/>
    php:<input type="checkbox" value="php" v-model="languages"/><br/>
    <hr/>
    您已精通的语言有:{{languages.join()}}
</div>


<script src="../node_modules/vue/dist/vue.js"></script>
<script>
    let app = new Vue({
            el: "#app",
            data:{
                languages:[]
            }

        })
    ;
</script>
</body>
</html>